Add .travis.yml, show coverage report (#16)

* Fix eslint on Windows
* Fix eslint errors in test folder

.gitignore

@@ -3,3 +3,6 @@ node_modules
 
 # OSX
 .DS_Store
+
+package-lock.json
+coverage

.travis.yml

@@ -0,0 +1,28 @@
+language: node_js
+sudo: false
+git:
+  depth: 10
+
+os:
+  - windows
+  - linux
+
+node_js:
+  - "8"
+  - "10"
+  - "12"
+
+install:
+  - npm version
+  - npm install
+script:
+  - npm test
+
+after_success:
+- ./node_modules/.bin/codecov
+
+# safelist (prevent double builds in PRs)
+branches:
+  only:
+  - master
+  - /^greenkeeper/.*$/

package.json

@@ -5,8 +5,8 @@
   "main": "src/index.js",
   "scripts": {
     "test": "npm run lint && npm run unit-tests",
-    "lint": "eslint './src/**/*.js'",
-    "unit-tests": "jest --ci -w=2",
+    "lint": "eslint src test",
+    "unit-tests": "jest --coverage --ci -w=2",
     "e2e": "jest --testRegex './e2e/e2e.js'",
     "generate-docs": "jsdoc2md -t ./docs/readme_template.md ./src/index.js > README.md"
   },
@@ -16,6 +16,7 @@
     "@adobe/aio-lib-core-logging": "0.0.4"
   },
   "devDependencies": {
+    "codecov": "^3.6.1",
     "eslint": "^6.2.2",
     "eslint-config-standard": "^13.0.1",
     "eslint-plugin-import": "^2.18.0",